Description
CAT 510-7300 Self Aligning Spherical Plain Bearing
| CAT 510-7300 Self Aligning Spherical Plain Bearing |
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The CAT 510-7300 is a single-row self-aligning spherical bearing from Caterpillar suitable for hydraulic cylinder lugs/connecting rod hinges. Its core function is to compensate for installation coaxiality errors, withstand radial loads, and is compatible with a small amount of bidirectional axial loads. It is suitable for the boom/stick cylinder hinges of Cat 320GC/323GC excavators, 950GC loaders, and other models. The following is professional structured information.
Core Parameters (Professional Version)
Project Details
Basic Attributes
Model 510-7300, 2 pieces per unit (symmetrical arrangement), compatible shaft diameter 50 mm, matching trunnion 1U-3582, bushing 1U-3583, single weight 1.85 kg, used for radial support and angle compensation of hydraulic cylinder trunnion/connecting rod hinge points
Key Dimensions
Inner diameter 50 mm (tolerance J7: +0.010–+0.035 mm), outer diameter 80 mm (tolerance m6: +0.015–+0.035 mm), width 22 mm (tolerance ±0.1 mm), spherical curvature radius R40 mm, cage center circle diameter 65 mm, steel ball diameter 8 mm (quantity 12, evenly distributed), chamfer at both ends 2×45° (tolerance ±0.1 mm)
Material and Process
Inner/outer ring material is 52100 Bearing steel (quenched hardness HRC60–64, hardened layer depth ≥1.5 mm), steel balls are Si3N4 ceramic (hardness HV1600–1800, thermal expansion coefficient 3.2×10⁻⁶/℃), cage is PA66+GF30 nylon (operating temperature -40℃ to +120℃), outer ring surface is hard chrome plated (thickness 0.02–0.03 mm, hardness HV700–800), inner ring raceway roughness Ra≤0.4 μm
Performance parameters: Rated radial dynamic load ≥28 kN, rated radial static load ≥12 kN, allowable self-aligning angle ≤2.5°, limiting speed (grease lubrication) ≤300 rpm, operating temperature -40℃ to +120℃, compatible with Cat MTO-1000 lithium-based grease, fatigue life ≥12000 hours (standard operating conditions)
Compatible models: Cat For 320GC/323GC/326GC excavators, 950GC/962GC loaders, and M318F wheeled excavators, the matching hydraulic cylinder model is 359-0677, and the lug assembly is 505-1291.
Installation and Maintenance Points: Before installation, clean the inner and outer rings of the bearing and the mounting holes. The mounting holes need to be bored to φ80H7 (tolerance 0–+0.030 mm). Use cold mounting (freeze at -20℃ for 1 hour) before pressing in, with a pressing force ≤50 kN, ensuring the bearing end face fits snugly against the mounting surface (clearance ≤0.03 mm).
Maintenance Cycle: Every 500 hours, add Cat-specific lithium-based grease (the amount added should overflow from both ends of the bearing). Check the bearing clearance (replace if radial clearance >0.3 mm). Replace the dust seal immediately if damaged.
Troubleshooting: If there is abnormal noise from the hinge point oscillation or increased resistance, first check for bearing wear, cage damage, and blocked lubrication channels. If necessary, replace the components and repair the mounting holes.
